[quote]Putting a different consoles disk in another console doesn't prove anything.[/quote] It absolutely does. If they are "literally the same" as you have stated then a PS4 should be able to run a PS3 copy of the game. But no, a PS4 cannot run a PS3 copy of Destiny. Why? Because they are different in ways that are not easily seen by consumers. These differences are what makes cross-gen difficult and costly to-do.